Fixes CVE-2019-9948 CVE-2019-9740 CVE-2019-10160 CVE-2019-16056
and expat CVE-2019-15903.
python-3.3.5-pyexpat-symbols.patch.1 fails to apply, and it's a
mystery why --with-system-expat is used everywhere but on MacOSX,
where 292af048ace2d4b455b2da3a22c784cb05db1d09 disabled it for no
obvious reason, so try to remove the special case and get rid of the
patch.
Change-Id: I5ba4532eb6e7c2fb90daba95d132dcc7c9013d96
Reviewed-on: https://gerrit.libreoffice.org/83117
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@cib.de>